Basic Mathematics for College Students

57. 
    

58.

59. 
    

60. 
    

61. 
    

62. 
    

63. 
    

64. 
    

65. 
    

    , for and.

    
    


66. 
    

    , for and.

    
    


67. 
    


68. 
    


69. 
    


70. 
    


71. 
    

    Subtract from the sum of and.

    
    


72. 
    

    Subtract from the sum of and 1.

    
    

5

8

2

5

12

3

2

3

3

1

5

7

3

7

9

1

10



4

3

 2

5

6



5

6

 1

7

8

a

9

20

 2

2

5

ba

3

4

b

2

a 2 

1

2

b

2

a 2 

1

2

b

2

w

3

5

l

7

8

P 2 l 2 w

l 5 w 73 5

5

6

Alw

2

3

5

a

1

3

b

2

a

1

2

b

1

3

5

a

1

2

b

2

a

3

4

b

1

8

a

1

2

b

1

4



3

8

1

5

a

1

4

b

1

4



4

5

`^ ^

3

16

 2

1

4

` a 2

1

8

b

`^

2

3



9

10

` a

1

5

b

4

1

4

2

3

a

1

6

b

5

1

2



1

4



3

4

73.

74.

75.

76.

77. REMODELING A BATHROOM A handyman
    installed 20 rows of grout and tile on a bathroom wall
    using the pattern shown below. How high above floor
    level does the tile work reach? (Hint:There is no
    grout line above the last row of tiles.)


78. PLYWOOD To manufacture a sheet of plywood,
    several thin layers of wood are glued together, as
    shown. Then an exterior finish is attached to the top
    and the bottom, as shown below. How thick is the
    final product?
    -^1
    8
    in. each

––^3

16

in. each

Exterior finish pieces:

Inner layers:

Floor level

Bathroom tiles:

4 in. squares

Grout lines:

in. wide

(^1) –
2
––^1
16

APPLICATIONS

a 1 

3

4

ba 1 

3

4

b

a

8

5

 1

1

3

b a

4

5

 10 b

1

3



1

4

1

3



1

4

1

2



1

4

1

2



1

4

3.7 Order of Operations and Complex Fractions 293